Breathing mask



1. Breathing mask

1.1 : Perspective

1.2 : Front

1.3 : Back

1.4 : Left

1.5 : Right

1.6 : Top

1.7 : Bottom

1.8 : Exploded

The broken lines indicate portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a breathing mask, as shown and described. 